Dimmable LED

The EzloPi smart devices provide automation through simple, customizable use with our open-source EzloPi platform, making daily life easier and improving human-machine interactions.

Before moving into this example, it is very important to know about the device registration, provisioning and converting the ESP32 device into an EzloPi device along with knowledge of Web Flasher, MiOS Mobile Application for Android/iOS and the MiOS Web Application.

1. About this example

In this example, we will be interfacing the LED with the EzloPi device, which will allow you to control the brightness of an LED using the Pulse Width Modulation (PWM).

Also, the ON/OFF state of the LED can be controlled.

2. Project Video Demonstration

Welcome to the project demonstration video section. The following video showcases the key aspects of Dimmable LED, providing a visual walkthrough of its implementation.

Play Video

3. Circuit Setup & Interfacing

The following components are required for interfacing the LED using the EzloPi device:

  • ESP32 as EzloPi smart device.
  • LED Light with a current-limiting resistor.

The wiring diagram is represented as follows:

Wiring Diagram

The following connections are made in order to complete the entire circuit setup.

From ESP32 to the LED:

  • Connect the shorter leg (cathode) of the LED to the GND Pin of the ESP32.
  • Connect the longer leg (anode) of the LED via a current limiting resistor as shown in the diagram above to the IO4 pin of the ESP32.

4. Interfacing the LED with the Web Flasher

  1. Set up your device/hardware by visiting config.ezlopi.com
Dimmable LED
  1. Log in by using the credentials to your MiOS account.
Dimmable LED
  1. Now click on the Connect Device button and a pop-up window will appear
Connect to a Serial Port
  1. Now, select the COM Port to which your ESP32 device is connected. In our case, the COM3 port is used.
  2. Click Connect.
Connect to a Serial Port
  1. If you are new to this and it’s your first time configuring, select Create new Device ID and enter the Wifi SSID and Wifi Password.
  2. Now, In the Device Configuration, tab click on PWM.
Device Form

8. A window will open for inputting the following parameters:

  • Set a device name of your choosing. In our case, we set it to Dimmable LED.
  • Set Out GPIO to 4
  • Set Frequency
  • Set the Resolution to 12-bit
  • Set the Duty Cycle
  • Now Click the Apply button.
  • After clicking the apply button you can see a table of your settings in the device configuration tab.
  • Press the Flash Device button.
Device Configuration
  1. A window will appear on the bottom left side of the screen displaying “Please press BOOT button while flashing begins.”
  2. Hold the BOOT button down until the next window appears on the bottom left side of the screen which says “Installation prepared. Please release the boot button now.”
Device Status
  1. Release the BOOT button from your ESP32 when this pop-up on the bottom right window appears.
Device Flashed
  1. After some time this popup will appear saying Device Flashed Successfully! This means that your device has been set up successfully.

5. MiOS App

You can download the MIOS Android app from the Google Play Store and Apple App Store.

Google PlayApple App Store
  1. After downloading the app, proceed to install the application and open it.
MiOS Installed App
  1. Using the MIOS mobile application, create a new Ezlo Cloud account using the sign-up option. If you already have an account, you may proceed to log in.
MiOS Login
  1. After successfully logging in, you will be able to see the number of controllers connected such as a lamp, fan, or any other device in the MiOS app. Tap on any controller of your desired ID.
MiOS App Mobile
  1. You will be able to see the status of your controller whether it is online or offline. Access the device dashboard, and tap the device. The following view of the dashboard will appear:
  1. After opening the dashboard, you will be able to see the tile of your connected device.

Here as you can see in the example given above, we can see the LED dimmer tile. The slider bar is used to control the brightness of the LED and the toggle button is used to turn the LED ON or OFF.

6. MiOS Web Application

  1. After configuring the controller with the EzloPi web flasher, head to ezlogic.mios.com
Login MiOS
  1. Use the same credentials to log in that you used for configuring the controller with the web flasher.
Dimmer OFF
  1. In the above figure, the status of the device is indicated whether it is ON or OFF along with a slide bar to control the brightness/intensity of the LED.
  2. Moving the slider to the right will increase the brightness and moving it to the left will decrease it. Also, there is a toggle switch that is used to turn the LED ON or OFF.
Dimmer ON
  1. The demonstration of the operation of the toggle switch and slider bar is shown in the above picture.
Buy Components

eZlopie Products A single-channel 5V relay module $00.00

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eZlopie Products Level Shifter Module (BSS138) $00.00

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